It's definitely cooler than a submerged pump most definitely, but if you're going to do away with the cover.. I'd rather you sell and buy another tankset because you're back to square 1 as mentioned by bro qool.
I personally feel a LumiQ is overpriced because of its looks and the led light. With the same amount of money you can create a more comfortable place for your shrimps/fish/plants to live in.
If you still wish to go ahead with the idea of using the low iron glass tank, the small size of the tank would make it difficult to maintain and you will find that a HOF will take up half the rim width at the back.
After adding a clip-on light you will find the back rim of your tank is fully occupied and to some people all that clutter can look unsightly.
If you would still like to use it and learn how to convert the filter as i mentioned previously, you can drop me a pm and i'll go through it with you slowly.
Edit: Managed to find a photo, it's rather crude but i'll attach it here.
mms_20130623.jpg
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